var chap_array = new Array(
    ["Special - Supporting Character Y-ko's Story",'11.1'],

    ["11 - Lies",'11'],

    ["10 - Dreams",'10'],

    ["9 - Comparing Heights",'9'],

    ["8 - The Punishment Game",'8'],

    ["7 - Meeting",'7'],

    ["6 - First Love's Storm",'6'],

    ["5 - Trigger",'5'],

    ["4 - Heart",'4'],

    ["3 - Happiness",'3'],

    ["2 - 12 Years Old",'2'],

    ["1 - Future",'1']
);
for (var i=0; i<chap_array.length; i++) {
    document.getElementById('id_chapter_1').options[i] = new Option(chap_array[i][0],chap_array[i][1]);
    if (document.getElementById('id_chapter_2')) {
        document.getElementById('id_chapter_2').options[i] = new Option(chap_array[i][0],chap_array[i][1]);
    }
}